Rapid-fire carbureter.



No. 886,265.. PATENTE) APR. 2 8, 1908.

J. A. SPEED.

RAPID'PIRB GARBURBTER. APPLICATION FILED AR. Z5, 1907.

UNITED STATES PATENT OFFICE.

JAMES A. SPEED, or Los ANGELES, CALIFORNIA, .issieNoR To SPEED COMPANY, O'F LOS ANGELES, CALIFOR.NIA,'A CORPORATION OF CALIFORNIA.

RAPID-FIRE CARBUEETER..

Specification of Letters Patent.

Patented April 28, 1908.

Applicationled April 25, 1907. Serial No. 370,132.4.

To all whom it may concern:

13e it known that I, JAMES A. SPEED, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Rapid-Fire Carbureter, of which the following is 'a specification.

lThis invention relates to carbureters and has for its object to provide a carbureter which will supply a mixture of the right proportion at anyY speed of the engine.

Another object is to provide a novel `means for facilitating the vaporization of the gasolene or other liquid fuel employed.

Another object is to prevent vaccidental floodin ofI the carbureter. Y

Anot er object is to provide for securing extremelyl accurate regulation'of the condenser, a further object being to'efiect the regulating movements bv sliding elements instead ofby revoluble parts. f l

Another object .is to provide Van auxiliary supply of air and to purify the same before 1t combines with the mixture.

v v1, through the center of which extends a of which is Vformed a valve seat 9.

strangling tube 2. A gasolene nozzle 3 is arranged in the center of the strangling tube and the lower end, of the nozzle 3 communicates with a hollow screw plug 4 which is provided with fo'ur radial orifices 5 which per- .;mit the gasolene Vto flowrom the lowerportion voi chamber 6 into the lower end of the noz# zle 3. A tubular casing 7 is arranged at one side of thefloat chamber and in the lower end thereof is screwed a nipple 8 in the upper end Gasolene is admitted through a pipe 10 tothe nipple 8. Av lock nut 23EL holds the nipple in the position Y vto Which-it may be adapted. A valve rod 11 is arranged in the chamber 7, the lower end o'f the valve rod having a conical valve 12 yvalve stem 25, which projects MANUFACTURING adapted to it the seat 9, While the upper portion of the valve rod has an extension 1.3, of reduced diameter, which slides in a tubular extension 14. A coil compression spring 15 1s arranged inside of the chamber 7 around the extension 13 and serves to-de ress the valve rod and close the valve. T e valve rod is provided with a duct or vent 16 which extends from the up er end of the valve rod,

and which lies in theiloat valve chamberand straddles the stran ling tube 2.

Encircling the strangling tube l2 and resting on the fork 21 is a float 22. enters through pipe 10 and owing past the valve 12 enters the i'loat chamber' and is maintained at about the level indicated..

When the gasolene falls below this level, as the float drops, it depresses fork 21 and causes fork 19 to lift 4the valve 12, thus permitting more gasolene to enter the iioat chamber, and as the level of gasoleie rises, the float in rising permits thel valve 12 to be depressed by spring 15 and thus restrict the flow of gasolene, By loosening the lock nut 8a the nipple 8 may be adjusted up or down to re ulate the level of gasolene in lthe ioat cham er.

In the upper end of the nozzle 3 is a valve seat 23 Which is adapted to be closed by a conical valve 24, the latter bein@` carried on a down through the valve seat and into the nozzle 3, the lower end of stem 25 being slidablv mounted in a guide 24a formed in the nozzle 3. The upper end of the valve stem 25 is engaged bv a split sleeve 26 which is formed with a split head 27, the ,two sections of which are clamped. together by screws 28. spring 29 is interposed between a liange() and the Wall 31 which incloses a mlxing chamber. The head 27 is provided with a transverse slot through which passes a wedge T he gasolenel A coil y 32, the head 27 having a roller 33 which bears on the upper edge of the Wedge 32, and the spring 29 Serves to draw down the valve stem 25 and hold 'the roller 33 against the Wedge 32, the latter being supported by a pair ot' rdllers The Kwedge 32is pivoted l drical valve 53 'isslidably arranged in the at 35 to an operating rod 361 Part of the wedge 32 and adjacent end ot rodV 36 are housed in a tube 37 which bridgesthe discharge passagej38. A cap 39 is slidably ar ranged on the casting of the carbureter and when slid into place completely houses the wedge, the rollers and head 27, and prevents tampering of these, parts. A seall 40, as shown in. l? ig. 3, may be provided which will prevent the withdrawal oi the cap 39 without y detection. This will enable the carbureters to be sent out from the factory properly assembled and sold under a guarantee, and will prevent unauthorized tampering with the adjustments, as the contract may be violated if upon bringing a carbureter back to the factory, for alleged, defects, the seal is not intact. A

Air is admitted to the strangling tube 2 through an air passage 41, the casting having an ,orifice 42 for the admission of air to passage 41. From the passage 4l air enters the lower part ci the vstrangling tube 2 in the al1- nular space between the strangling tube and the nozzle 3, and as the air is sucked up through this annular space it is given a vortical or whirling motion by means of a coiled wire 43. This air from the strangling tube 2 enters the mixing chamber 44 land as the air passes through the upper part of the stranglingxtube the gasolene which is sucked up through the nozzle 3 is deflected by the conical valve 24 and mixed with the air in the strangling tube, the gasolene being broken up and partially vaporized by its imp act with the valve 24 and lby its deiiection'thereby, and the vaporization is further effected as this partiall'y vaporized gasolene mixes with the air in the upper part of the strangling tube, the whirling movement of the air re sulting, in a marked degree, in promo'ting the vaporization and mixture.

A horizontal cylinder 45 projects from the upper end of the carbureter and one side 'thereof is formed With a substantially `triangular air inlet opening 46 havingcurved sides forming a graduated opening, partially shown inFig. 3 and shown in dottedlines in Fig. 1.- The cylinder`45 is divided by a partition 47 into two air chambers 48 and 49, the air opening 46 communicating with the chamber 48. through the partition 47, being arranged concentrically in the cylinder 45, and the right hand end of tube 50 communicates with the mixing chamber 44 and 'is provided with four substantially triangularopenings 51 having curved edges forming graduated openings for the passage of mixture out. of that part of the tube. The left hand portion of the tube() communicates with a chamberv `48 through the end of the tube.

A cylindrical valve 52 is sli-dably arran .ed in the cylinder v45, while a smaller cy 1n- A horizontal tube 5() extendstube 50, both valves 52 and 53 being carried by a valve 'rod 54 which extends through a cap 55 on the end of cylinder 45, and an arm 56 connects the valve rod 54 with the Wedge operating rod 36. The valve rod 54 may be connected in any desired manner with a controlling device, not shown. The valve 53 regulates the area ot'the openings 51, while the valve 52 regulates the area ofthe opening 46, and in Fig. 1 the valves are shown in their extreme positions to the left in which openings46 and 51 are open to their fullest extent. The mixture with its pri-mary amount of air is drawn by suction of the enginey from the mixing chamber 44 into the tube 50 and out through the openings 51 into the chamber 49 and thence through the openings 38 to the induction pipe of the engine.

The suction produced. in chamber 49 also results in drawing in an auxiliary air supply through the opening 46 into the chamber 48 externally of the tube 50. This air passes to the left and into .the interior of the valve shell 52, is deflected back, as indicated by the arrows, and enters the left end of valve 53 and passes entirely through the shell of valve 53, and in the right hand portion of tube 50 combines with the mixture'which has entered from the other direction from mixing chamber 44. The total mixture thus combined passes out through the openings 51 into the chamber 49 and thence through passage 38 which will not only reduce the amount ofA suction in the carbureter but will also restrict the amount of air which enters through open ing 46, and at the same time the wedge 37 moves a corresponding distance to the right and allows the spring 29 to ex and and close the valve 24 a corresponding egree, thus reducing the amount of gasolenefed into the strangling tube. By' entirely closing the valves 52 and 53 the Wedge 37 will have been moved so far to the right that the valve 24 will have been completely closed by the expansionof spring 29.

Abell crank lever 60 is pivoted at 61 and its upper end is adapted to be operated bythe end of the Wedge 37. An adjusting screw 62, in the lower end of' the bell crank lever 60,

has a reduced end which carries a compression spring 63, 'and a pressure plate is carried on the lower end of the spring 63. Vhen the wedge is moved to the extreme right, a notch 64 in the upper ed ve of. the wedge comes under roller 33 and allows the head to drop free rom restraint by the wedfre which permits the valve 24 to sink natural y to its seat. At the-same timethe lever 60 compresses spring 63 and forces valve'lZy to its seat. This insures absolute closure of both valves 12 and 24 and prevents flooding. Thus it Will be made, and the wear of this adjusting device is practically 'Wil by reason oi the rollers 33 and 34 between which'the wedge slides.- The Wear/lon valves 52 and 53 is also very slight by reason of their sliding movement.

What I claim is i 1. In a carbureter, a strangling tube, means for spraying gasolene into thev strangling tube comprising a'nozzle; in the tube, a

valve at the upper end ofthe nozzle, an upper stem on said valve, a lower stem onsaid valvel proj ectinginto said nozzle, a guide in the nozzle in which the lower stem slides, means for admitting air to the strangling tube to combine with the spray of gasolene, auxiliary means for admitting a further supply of air to the mixture after it has left the strangling tube, and mechanism having 'an engagement with said upper valve stem and with said auxiliary means for simultaneously operating the auxiliary means and valve.

2. In a carbureter, a strangling tube, a gasolene nozzle concentric therewith, means for admitting gasolene to the lower portion of the nozzle, means for admittinvr air to the lower portion of the strangling tube, a valve ,at the upper end of the nozzle, a mixing chamber above the strangling tube, a stem on said valve projecting through the mixing chamber and ha ring a head, and a wedge j slidably engaging said head for adjusting the valve. .l j

3. In a carbureter, a str-angling tube, a gasolene nozzle concentric therewith, means for admitting gasolene to the lower portion of the nozzle, meai'is for admitting air to the lower portion oi the strangling tube, a valve at the upper end olz the nozzle, a mixing chamber above the strangling tube, a stem on said valve projecting through the mixing chamber and having ahead, a wedge slidably engagingsaid head foradjusting the valve, a roller carried by the head bearing against the upper edgeofthev wedge,rollers mounted above the mixing chamber and bearing against the lower edge of said wedge, and a spring bearing against a Bange on the valve stem for closing the valve ll In a carbureter,l vaporizing means, a horizontal -cylinderhaving a partition, a tube in said-partition, the cylinder having an air inlet at one side of the partition, said tube having mixture outlet openings on the other side of the partition, a cylindrical sliding valve in said tube for regulating the size of the latter openings, alarger cylindrical valve in the cylinder for regulating the air inlet opening, a valve rod forv operating both valves and a mixing lchamber 'communicating withsaid vaporizing means and the adjacent open end of said tube.

. 5. In a carbureter, vaporizing means, a

horizontal cylinder havinga partition, a tube in said partition, the cylinder having an air inlet at one side of the partition, said tube having mixture outlet openings'on the other side of the partition, a cylindrical sliding valve in said tube for regulating the size of the latter openings, a larger cylindrical valve in the cylinder for regulating the air inlet opening, a valve rodl for operating both valves, a mixing chamber communicating with said vaporizing means and the adjacent open end of said tube, a valve for the vaporizing means, the valve having a stem which projects through the mixing chamber and havinga head on its upper end, a wedge slidably engaging said head, an operating rod pivoted to one end of the wedge, and an arm connecting the operating rod with the iirst named valve rod.

6. In a oarbureter, vaporizing means, a gasolene nozzle therefor, a valve for the noz-- zle, a wedge for operating said valve, a valve for controlling the admission of gasolene to the vaporizing means. a bell crank lever en gaged by the end of said wedge, an adjusting screw in the bell crank lever, and spring' means carried by the adjusting screw for pressing against the stem oi the latter valve tol close the same when the Wedge is operated to close the former valve` In testimony whereof, I have hereunto set my hand at Los Angeles, California this 18th day of April 1907.

JAMES A.` SPEED.

In presence ofk GEORGE T. HAcxLnY,y FRANK L. A. GRAHAM.I 

